/// <summary>
///
/// </summary>
/// <param name="subLine"></param>
/// <returns></returns>
public virtual LinearLocation[] IndicesOf(IGeometry subLine)
{
ICoordinate startPt = ((ILineString)subLine.GetGeometryN(0)).GetCoordinateN(0);
ILineString lastLine = (ILineString)subLine.GetGeometryN(subLine.NumGeometries - 1);
ICoordinate endPt = lastLine.GetCoordinateN(lastLine.NumPoints - 1);
LocationIndexOfPoint locPt = new LocationIndexOfPoint(linearGeom);
LinearLocation[] subLineLoc = new LinearLocation[2];
subLineLoc[0] = locPt.IndexOf(startPt);
// check for case where subline is zero length
if (subLine.Length == 0)
{
subLineLoc[1] = (LinearLocation)subLineLoc[0].Clone();
}
else
{
subLineLoc[1] = locPt.IndexOfAfter(endPt, subLineLoc[0]);
}
return(subLineLoc);
}
/// <summary>
/// Computes the index for the closest point on the line to the given point.
/// If more than one point has the closest distance the first one along the line is returned.
/// (The point does not necessarily have to lie precisely on the line.)
/// </summary>
/// <param name="pt">A point on the line.</param>
/// <returns>The index of the point.</returns>
public virtual LinearLocation Project(Coordinate pt)
{
return(LocationIndexOfPoint.IndexOf(linearGeom, pt));
}
/// <summary>
///
/// </summary>
/// <param name="linearGeom"></param>
/// <param name="inputPt"></param>
/// <returns></returns>
public static LinearLocation IndexOf(IGeometry linearGeom, ICoordinate inputPt)
{
LocationIndexOfPoint locater = new LocationIndexOfPoint(linearGeom);
return(locater.IndexOf(inputPt));
}
